358 E. Loomis on vibrating Water-fails. 
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quantity of the effect is much less. 
In order to reduce, as far as possible, the influence of the errors 
of observation, and to diminish the labor of calculation, I have 
divided my observations into four groups, and taken the average 
of the depths of water, as well as of the times of vibration. 
The first group includes the observed depths less than 20 
inches; group second includes the observed depths from 20 to 
40 inches; group third, the depths from 40 to 51 inches; and 
group fourth, the depths from 51 to 60 inches. The results are 
as follows: : 
Depth of water No. of vibrations) Temperature {Observed time of 
by gauge. per minute, of the water. 
15-90 inches. 25474 | 73° 
25:33 =“ 13487 713 
48-15 “ 81-20 43 
5433 79°83 43 
ze 
